Well, we didn't see this one coming! Serious Sam 4 has surprise launched on Xbox Series X and Series S today, and it's now included with Xbox Game Pass for Series X, Series S, PC and Xbox Cloud Gaming. Great stuff!

The game is a prequel to the beloved Serious Sam series, and it first launched last year on PC, attaining a 68 Metacritic rating at the time. You can play through the campaign in 4-player online co-op or just go it alone, taking on hordes of alien invaders with a "slew of devastating weapons".

As mentioned, there's no Xbox One version of Serious Sam 4 right now, although the cloud version should at least be accessible on last-gen consoles. If you want to buy it permanently, there's a Serious Sam 4 Launch Bundle which costs ยฃ33.49 / $39.99 and it includes the Serious Sam Collection.

Croteam returns with a high-powered prequel to the Serious Sam series that scales up chaos to unprecedented levels. The classic Serious Sam formula is revamped by putting an unstoppable arsenal up against an unimaginable number of enemies that requires players to circle-strafe and backpedal-blast their way out of impossible situations.

Will you be trying out Serious Sam 4 with Xbox Game Pass later today? Let us know in the comments.

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